require 'rubygems'
require 'httpclient'

url = "https://mail.google.com/a/yourwebsite.com/feed/atom"
client = HTTPClient.new
client.debug_dev = STDOUT if $DEBUG
client.set_auth(url, 'yourname@yourwebsite.com', 'yourpassword')
resp = client.get(url)

<link rel="alternate" type="application/rss+xml" title="RSS Feed" href="rss.xml" />

<!-- or... //-->

<link rel="alternate" type="application/atom+xml" title="Atom Feed" href="Atom.xml" />

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:atom="http://purl.org/atom/ns#draft-ietf-atompub-format-05" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <xsl:output method="html" />
  <xsl:template match="/">
    <xsl:apply-templates select="/atom:feed/atom:head" mode="before" />
    <xsl:apply-templates select="/atom:feed/atom:entry" />
    <xsl:apply-templates select="/atom:feed/atom:head" mode="after" />
  </xsl:template>
  <xsl:template match="atom:feed/atom:head" mode="before" >
    <!-- <h3><xsl:value-of select="atom:title" /></h3> -->
  </xsl:template>
  <xsl:template match="atom:feed/atom:head" mode="after">
    <p><a href="{atom:link[@rel='alternate']/@href}"><img src="http://blogmarks.net/img/88x31_neg.png" alt="blogmarks.net" /></a></p>
  </xsl:template>
  <xsl:template match="atom:feed/atom:entry">
    <div>
      <xsl:choose>
        <xsl:when test="position() mod 2 = 1">
          <xsl:attribute name="class">bm_blogmarks bm_odd</xsl:attribute>
        </xsl:when>
        <xsl:otherwise>
          <xsl:attribute name="class">bm_blogmarks bm_even</xsl:attribute>
        </xsl:otherwise>
      </xsl:choose>
      <a href="{atom:link[@rel='related']/@href}"><img src="{atom:link[@rel='image']/@href}" alt="" /></a>
      <h4><a href="{atom:link[@rel='related']/@href}"><xsl:value-of select="atom:title" /></a></h4>
      <p><xsl:value-of select="atom:summary" disable-output-escaping="yes" /></p>
      <p class="blogmarks-tags">
        <xsl:value-of select="substring(atom:published, 0, 11)" />
        <xsl:if test="atom:category">
          <xsl:for-each select="atom:category">
            <xsl:text> - </xsl:text><a href="{@term}{@sheme}"><xsl:value-of select="@label" /></a>
          </xsl:for-each>
        </xsl:if>
      </p>
    </div>
  </xsl:template>
</xsl:stylesheet>

.bm_blogmarks {
	margin: 10px auto;
	padding: 1%;
	background-color: #f5f5f5;
	border: 1px solid #d9d9d9;
	width: 97%;
	overflow:auto;
}
.bm_even {
    background-color: #fcfcfc;
}
.bm_blogmarks h4 {
	margin-top: 0;
}
.bm_blogmarks p.bm_tags {
	margin-bottom: 0;
	display: block;
	clear: left;
}
.bm_blogmarks img {
	margin: 0 0px 5px 10px;
	float: right;
	border: 0;
	clear: none;
	width: 144px;
	height: 107px;
}
.bm_even img {
	margin: 0 10px 5px 0px;
	float: left;
}

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
  xmlns:atom="http://purl.org/atom/ns#"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:dc="http://purl.org/dc/elements/1.1/">
    <xsl:output method="html"/>
    <xsl:template match="/">
    <xsl:apply-templates select="/atom:feed/atom:head"/>
        <xsl:apply-templates select="/atom:feed"/>
    </xsl:template>
    <xsl:template match="atom:feed/atom:head">
        <h3><xsl:value-of select="atom:title"/></h3>
        <xsl:if test="atom:tagline"><p><xsl:value-of select="atom:tagline"/></p></xsl:if>
        <xsl:if test="atom:subtitle"><p><xsl:value-of select="atom:subtitle"/></p></xsl:if>
    </xsl:template>
    <xsl:template match="/atom:feed">
        <h3><xsl:value-of select="atom:title"/></h3>
        <xsl:if test="atom:tagline"><p><xsl:value-of select="atom:tagline"/></p></xsl:if>
        <xsl:if test="atom:subtitle"><p><xsl:value-of select="atom:subtitle"/></p></xsl:if>
        <ul>
            <xsl:apply-templates select="atom:entry"/>
        </ul>
    </xsl:template>
    <xsl:template match="atom:entry">
        <li>
            <a href="{atom:link[@rel='related']/@href}" title="{substring(atom:published, 0, 11)}"><xsl:value-of select="atom:title"/></a>
            <xsl:choose>
                <xsl:when test="atom:content != ''">
                    <p><xsl:value-of select="atom:content" disable-output-escaping="yes" /></p>
                </xsl:when>
                <xsl:otherwise>
                    <p><xsl:value-of select="atom:summary" disable-output-escaping="yes" /></p>
                </xsl:otherwise>
            </xsl:choose>
        </li>
    </xsl:template>
</xsl:stylesheet>

xml.instruct!

xml.feed "xmlns" => "http://www.w3.org/2005/Atom" do

  xml.title   "Feed Name"
  xml.link    "rel" => "self", "href" => url_for(:only_path => false, :controller => 'feeds', :action => 'atom')
  xml.link    "rel" => "alternate", "href" => url_for(:only_path => false, :controller => 'posts')
  xml.id      url_for(:only_path => false, :controller => 'posts')
  xml.updated @posts.first.updated_at.strftime "%Y-%m-%dT%H:%M:%SZ" if @posts.any?
  xml.author  { xml.name "Author Name" }

  @posts.each do |post|
    xml.entry do
      xml.title   post.title
      xml.link    "rel" => "alternate", "href" => url_for(:only_path => false, :controller => 'posts', :action => 'show', :id => post.id)
      xml.id      url_for(:only_path => false, :controller => 'posts', :action => 'show', :id => post.id)
      xml.updated post.updated_at.strftime "%Y-%m-%dT%H:%M:%SZ"
      xml.author  { xml.name post.author.name }
      xml.summary "Post summary"
      xml.content "type" => "html" do
        xml.text! render(:partial => "posts/post", :post => post)
      end
    end
  end

end

https://USERNAME:PASSWORD@gmail.google.com/gmail/feed/atom